Which of the following lists the body's first, second, and third lines of defense in order?
A. Adaptive immunity, external innate immunity, internal immunity
B. External innate immunity, internal innate immunity, adaptive immunity
C. External innate immunity, adaptive immunity, internal innate immunity
D. External adaptive immunity, internal adaptive immunity, innate immunity
E. Innate immunity, internal adaptive immunity, internal innate immunity
B
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Match the change in gas composition with the response (disregard weak responses).
1. Arterioles: systemic constrict, pulmonary dilate. 2. Bronchioles and systemic arterioles dilate. 3. Arterioles: systemic dilate, pulmonary constrict. 4. Bronchioles and systemic arterioles constrict. A. PO2 increases. B. PCO2 increases. C. PO2 decreases. D. PCO2 decreases.
Which organelle is not membrane-bound?
a. Golgi body b. lysosome c. mitochondrion d. RER e. ribosome
Pacemaker activity that establishes the rhythmicity of breathing resides in the
a. lung tissue. b. respiratory muscles. c. Pre-Botzinger complex d. phrenic nerve. e. reciprocal relationship between the inspiratory and expiratory neurons of the ventral respiratory group.
The three basic types of protein fibers found in connective tissue are________
A) tendons, ligaments, and elastic ligaments B) collagen, reticular, and elastic C) loose, dense, and irregular D) cartilage, bone, and collagen